Bending and welding machine.



w. c. WINPIELD' & A. c. TAYLOR.

BENDING AND WELDING MACHINE. APPLIOATION FILED JULY 29, 1911.

Patented Aug. 26, 1913. 4 SHEETS-SHEET 1. 26 27' ,3% 25 :fihiiiiiumnw IYWIIIIIIIIIIIMIW 7" f b. Fig. 3

lrrssr //v VENTORS 1 mZL h W' C MIA/F1510 A I B),- QSERWSCZEYLOR AT-TY-sW. G. WINFIELD &: A. G. TAYLOR.

BENDING AND WELDING MACHINE. APPLICATION PIFLED JULY 29, 191i.

4 SHEETS-SHEET 2.

ll 27- l I l l I ATTEST l/vvszvroes BY 41-1 'r s.

Patented Aug. 2 1913.

W. C. WINFIELD & A. G. TAYLOR.

BENDING AND WELDING MACHINE. APPLICATION FILED JULY 29, 1911.

Patented Aug. 26, 1913.

4 SHEETS-SHEET 3.

ATTssT lNvsArroRs WILL/21M C. M/liVF/iZLD ALBERT/S Cffinon:

W'. G.-- WINFIELD & A. 0. TAYLOR.

BENDING AND 'WELDING MACHINE. I APPLIOATIQN FILED JULY 29, 1911.

1,071,490. Patented Aug. 26, 1913 4 SHEETS-SHEET 4.

1 Fig. 7

A7756 T ./NVENTOR$ llfluhm C MAW/21b ALBERT/ 6 C. Eric/t BY %MATTYS.

' form and true to any predetermined angle the dotted cross lines xw'indicate the final I angle ofbend and theamount of stock left. I

-' 1i] achine. Fig. 8 is a-perspective view of one UNITED surge PATENTonn on.

WILLIAM C. WINFIELD AND ALBERTIS-G. TAYLOR, 0F WARREN, OHIO, ASSIGNORSTO THE WINFIELD MANUFACTURING COMPANY, OF WARREN, OHIO, A CORPORATION.

BENDING" AND WELDING. acrame.

To all w/wmz'i may concern: Be it known that we, WILLIAM C. WIN-g FIELDand Amsnn'rrs C. TAYLOR, citizens of; the United .States, residing atWarren, in; the county of Trumbull and State of.Ohio, have inventedcertain new and useful Ina-j provements in Bending and Welding Ma-'chines, of which the following is a specification. l a

This invention relates to a bending and welding machine, and theinvention consists in a machine particularly constructed to bend andelectrically weld metal bars, sub stant-ially as herein shown anddescribed and more particularly pointed out in the claims. Briefly, theobject of the invention is to: rovide a machine adapted to hold anotched ar between clamps rotatably related to one another whereby thebar may be bent to any given angle and whereby ressure and! an electriccurrent may be app ied in be'nding operations to weld the bar wherenotched. The machine saves labor and operates rapidly and economicallyand the welded product is free from scale and is bent uni within therange of the machine as constructed.

In the accompanying drawings, Figure 1: is a perspective view of themachine, showi ing a metal bar clamped therein ready for bending andwelding. Fig. 2 is a side ele' vation of a bar notched as it comes tothe machine to produce a right-angled bend, and

uncut to effect a welded union. Fig. 3 is="a -view of a bent bar, thefull lines indicati ng the first contacting position of the coincidentcut portions of the bar, and the dotted lii es showing the completed orfixed angle of bend in the bar. Fig. 4: is a verticalsection of themachine on line 4il, Fig. 5, looking to the rear, showing a bar clampedtherein ready for bending and welding, and Fig. 5 is a vertical sectioncentrally through the machine on line 55, Fig. 4. Fig. 6 is aperspective view of one of the upper clamping members. Fig. 7 is a planview of the of the lower clamping members,-- but with its depending legbroken short. 7 I The machine is particularly constructed to:

Specification .of Letters Patent.

bend and weld bars of angle iro n, but is;

v I Patented Ang.26, 1913.

Application'filed July 29, 1911-. Serial No. 611,300.

I not necessarily limited in use to this form and shape of bar. However,the present showing illustrates the machine as adapted to an angle-bar Aof L shape in cross section having two flanges a and b at right angles.In order to bend bar A to any predetermined angle, a necessary firststep is to notch or cut one of the flanges, otherwise buckling. of thebar would result. Thenotch or cut '0 is preferably of triangularformation, but the amount of stock, removed is dependent uppnth'e degreeof angle to which the bar is to be bent; and in any case, a certainamount of surplus stock is left at one or both the diverging edges ofthe cut so that a welded union may be obtained. For example, assumingthat a welded right-angled bend is to be made, flange b of bar .A is cutor notched asshown in Figs. 2 and 3, leaving about the amount of stock dalong each cut edge as shown within the dotted lines :ca2,

these dotted lines also representing the final bar is bent until thecoincident cut edges come into contact, a position of parts shown infull lines in Fig. 3. The electric current then passes through flange Z2at the contacting edges and brings this area'of the bar to a weldingheat and at the same time pres sure is applied by carrying bendingopera- ,tions to final completion, thereby upsetting the surplus stock dand effecting a welded union. The whole operation of bending and weldingconsumes less than a minute in a bar of angle iron having flanges ofapproximately one and one-fourth inches, in width. Having in mind theforegoing objects, a clear, understanding will be-had of the machinewhich comprises a hollow base 2 where in the electric currenttransformer 3 may be stored directly beneath the center of a tubular hubat having a flange 5 bolted to cap 6 1 turned on to heat the metal inthe uncut 5 flange a opposite the notch c, whereupon the on base 2. Hub4 has a lateral extension or top shelf 7 upon which a plate 8 is bolted,and this plate rests on insulation 9 as shown in Fig. 4 to electricallyinsulate the fixed metal clamps 10 and '11 from the body' of themachine: Clamps l0 and 11 'are ;to the left of the axial center'of themachine, and a simi lar pair of clamps l2 and 13 are located at. anequal distance to the right of this center, but the support for thelatter is a separate rotatable member 14 5 within hub 4 a'ndhaving anoverhanging shelf. or table 15 resting upon the segmentally'shapedoffset or shoulder 16 of hub 4.

The shelf portions of both hub 4 and rotatable member 14 are ofcorresponding shape, viewed in plan, including plate 8, and said partsare cutaway at their front on diverg the .metal, .and'to furtherfacilitate operations the flange a is heated preliminary to bending bypassing an electric current through the same from clamp to clamp. Forthis purpose, bottom clamps 10 and 12 have separate depending legs 17and 18, respectively, which extend through the tubular member 14 intohollow base 2 and serve as terminal posts for the flexible connections19 and 20 leading to transformer 3.

Legs 17 and 18 are rigid and spaced apart their full length and both arealso removed from the walls of member 14, and leg 18 has a rotativemovement about leg 17 when member 14 is turned, an operation obtained byhand of member 14 and extended through side slot 22 in cap 6. Clamps10-an d 12 are separate blocks of copper fastened to their respectivesupports by screws 23, and their opposed faces are partly beveled tocorrespond with the angular outline of plate 8 and shelf 15. A facingplate 24 of steel or other material of poor electrical conductivity ispreferably secured to the rear vertical face of clamps 10 and 12 toengage with flange a of bar A, and the advantage of this arrangement isto localize electrical heating of the flange b at the cut edges whenthe'bar is bent and the said edges come into contact. Obviously, whenthe electric current. is passing through the straight bar A heating offlange (I, is the first result in view of notch 0 in flange b, but whenthe bar is bent to bring the'coincid'ent cut edges together the currentwill naturally take the most direct path through flange b, particularlyin view of facing plate 24.

Upper clamps 11 and 13 are substantially alike in construction andmounting, and like reference characters will. be applied to like parts.Thus, each upper clamp consists of a block of cast iron substantiallysquare in cross section in its main body, and having an of tubular formsleeved lever 21 fastened to the bottom end angular. head'25 adapted toengage both flanges d and I) of bar A when clamped thereupon by screw Swhich is entered into the upper end of the clamp body. Screw S has ahand wheel 26 and is rotatably supported in hub 27 of a bracket 28bolted to plate 8 or shelf 15 as the case-may be, and each clamp 11 or13 is provided with longitudinal side ribs 29 adapted to slide ininclined guideways in bracket 28. The inclination of the said upperclamps is preferably fixed at approximately forty-five degrees to ahorizontaP plane, thereby permitting bar A to be placed within orremovedfrom the clamps with the greatest convenience. The clampingpressure is also applied equally to both flanges of the bar by theinclined arrange ment of the upper clamps as shown.

The construction. of the clamps may be varied to suit the needs of anyparticular form of bar, as it will be understood that I,

U, T or other shaped'bars may be bent and welded in this machine in thesame manner as L bars.

The electric current-controlling switch 30 may be mounted on the handlever 21 as shown in Fig. 1, or may be located on the side of themachine, and any suitable form of switch may be used. i Upper clamps 11and 13 are provided with steel face-plates 25 insulated from the angularbody portion thereof, and theseifaceplates co-act with face-plate 24 tolocalize the electric current in the cut flange Z). Obviously, lessheating is required for bending as compared with welding.

What we claim is:

1. In a machine for bending and welding notched angle iron', a set ofeleptrically isolated clamping devices having separate faceplatesinsulated therefrom. to hold a angle-iron with its notched portionat an intermediate point between straight piece of said devices, and arotatable support for one of said clamping devices having its rotatableaxis at an intermediate point between said devices.

2. A bending machine for bars comprising a set of clamping devices forthe bar having electrical terminal connections, said devices beingseparated one from another to pass the electric current through the barwhen clamped therein, and meansto impart an arc movement to one of saiddevices in the. same plane as the other device and in the samelongitudinal planeas the bar.

In a machine for bending and welding partiallyalivided bars, a. fixed,table having clamping devices secured thereon, a rotatable table havingclamping devices mounted thereon in the same plane as said first memher,and said clamping devices being separated and having independentelectrical terminal connections.

4. In a machine for bending and electri- Lot lace lding notched bars,

devices mounted in the sameplane or tably related and having metalinsulated from the body thereof tr g the bar to be electrically Weldedthe lines. of the notch therein. In a machine for bending and welding"tiaily-divided bars, separate sets of rota tably-rela'te'd clampsmounted in the same plane and-provided With'electrical connections, eachset ofclam s comprising aseating r'nember for the er and a fasteningmember moi/ably supported on an inclined piano, I v

a. machine for bending and Welding notched bars, a clamp having a fixedsupport and a second ciamp having atubular support rotatably mounted insaid fired support and electrical connections for said clamps extendingthrough said tubular support. I

7. In a machine for bending and welding metal bars, anfopen supporthaving a clamping member mounted thereon, and an open rotatable supporthaving a clamping member mounted thereon opposite vsaid first clampingmember, both said members having rigid leg portions extending through'said supports to make electrical terminal connections. I I p 8. Ina'machine for bending and welding metal bars,- a base having separateclamp supporting members mounted thereon in sleeved rotatable relation,separate clamping devicesfor the bar mounted on each of said members,and electrical terminal conductors for the clamping. devices extendingthrough said members, in combination with an electrical device mountedWithin 0 said base and electrically connected with said conductors.

9. In a machine for bending and welding notched bars, a base having atubular hub and current conducting clamps for the bar rotatably sleevedWithin said hub having current-conducting clamps'mounted thereonopposite said other clamps, means 'to electrically insulate the clampsonthe base from the said clamps on the tubular member and a hand leversecured to said rotatable member.

10. In a machinevfor bending and welding a notched flange in anangle-bar, a setof current-conducting members adapted to clamp the barat either'side of the notch therein, and means interposed between saidmembers and the unnotched flange to localize the welding current at thenotched portion during bending operations, and means to rotate saidclamping members relatively to one another.

a 11'. In a machine for bending and Welding a notched angle-bar, a setof currentconducting clamps having-separate clampseparate sets of l x13. Ina machine for bending and wel ding angularly-related faces toclamp the bar mounted thereon, and a tubular membering faceportions atsubstantially right angles and of different electrical conductivity,

-l2., In a machine for bending and welding'a riotched angle-bar, acurrent-conducting member having clamping faces at substantially rightangles and a beveled end face. i

a notched angle-bar, a current-conducting 7' member having afacing-plate of difie'rent material at one side thereof to' localizeheating of a bar at its notched portion during bending operations, I

14. In a machine-fdrbending welding a notched angle-bar, acurrent-conducting member comprising a head having angularly-relatedseating faces for the bar and provided Wlthflll offset depending leg andterminal. connection."

15. In a machine for bending and welding angle-bars, a clamping memberhaving angularly-reliited, seatingsurtaces, in co1nbination with asecond clamping member movably mounted on an inclined plane relativelyto" said first clamping member.

16. In a machine for bending and welding an angle-bar, acurrent-conducting member to seat the bar,'a clamping member having 95upon said current-conductingmbmber, and means to support said clampingmember for inclined movement in respect to the bar.

17. In a machine for bending and. welding a notched bar, a hollow baseadapted to hold a transformer and a tubular hub mounted centrallythereon having a'tubular member rotatably seated therein,-lateral ex-'tensions on said hub and member, a plate seated ininsulated relation onone of said parts, and separate current-conducting and clamping memberssecured to said plate and the other part. a

18. In a machine for bending a-ndwelding a partially-divided bar,current-conducting and clamping devices fpr the bar separated andinsulated fromone another, means to separately support one of said devices for turning movement about a fixed axis,and said clampingdevicesfhaving seating surfaces for the bar radially arranged in respectto said axis.

19. In a machine totbend and w eld angle iron, a base having a capprovid-li with a cylindrical hub, and lateral shelves at the top of saidhub, one of which is rotatably 'mounted on the said hub, in combinationwith separate sets of clamping devices mounted on said shelves, andelectric-cur rent conductors for said devices extending throiigh saidhub.

' 20. In a machine to bend and weld anglebars, a cap having a .sideopening andjprd vided with a hub, a rotatable member sleeved Within'saidhub having a hand lever projecting through said side opening, and separate sets of current-conducting clamps for the bar mounted upon the huband said rotatable member.

21. In a machine to bend and Weld angle bars, separate sets ofcurrent-conducting clamps, each comprising a fixed member and a movablemember supported to slide on an inclined plane, in combination with a'divided support for said separate sets of clamps rotzitahly arranged toswing one set of clamps on an are about the other set of clamps and onthe same plane therewith.

22. A machine adapted to bend and Weld a bar of angle-iron having one ofits flanges partially sub-divided at the point of bend, comprisingseparate devices rotatably. related side by side in the same plane toclamp both the integral and the divided flanges of the bar onoppositeside's, said devices being provided with means to pass an electricheating current. through the in-- tegral length of the bar heforebending and through the subdivided flange during bending operations. a

23. In a machine of the kind described, separate sets of electriccurrent-conducting clamps having beveled ends oppositely related topermit a rotatable movement adapt ing said ends to come intosubstantially parallel alinernent, and the clamps of oneset beingelectrically insulated from the clamps of the other set, separatesupports for said clamps at either side of a rotatable 7 axis, and meansto rotate one ofsaid sup- 35 ports about said axis.

In testimony whereof We. affix our signatures in presence of twoWitnesses.

WILLIAM C. WINFIELD'. 'ALBERTIS o TAYLOR. i

Witnesses:

J. L. Hnnzoo, GRACE B. VooEL.

